UST962001I4 - Preparation of dicalcium phosphate from phosphate rock by the use of sulfur dioxide, water, and carbonyl compounds - Google Patents

Preparation of dicalcium phosphate from phosphate rock by the use of sulfur dioxide, water, and carbonyl compounds Download PDF

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Publication number
UST962001I4
UST962001I4 US05/730,210 US73021076A UST962001I4 US T962001 I4 UST962001 I4 US T962001I4 US 73021076 A US73021076 A US 73021076A US T962001 I4 UST962001 I4 US T962001I4
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US
United States
Prior art keywords
sulfur dioxide
phosphate
dicalcium phosphate
carbonyl
filtrate
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
US05/730,210
Inventor
John F. McCullough
John F. Phillips, Jr.
Leslie R. Tate
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Tennessee Valley Authority
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Tennessee Valley Authority
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Publication date
Application filed by Tennessee Valley Authority filed Critical Tennessee Valley Authority
Priority to US05/730,210 priority Critical patent/UST962001I4/en
Priority to US05/779,038 priority patent/US4113842A/en
Application granted granted Critical
Publication of UST962001I4 publication Critical patent/UST962001I4/en
Pending legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F11/00—Compounds of calcium, strontium, or barium
    • C01F11/48—Sulfites
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B25/00—Phosphorus; Compounds thereof
    • C01B25/16—Oxyacids of phosphorus; Salts thereof
    • C01B25/26—Phosphates
    • C01B25/32—Phosphates of magnesium, calcium, strontium, or barium
    • C01B25/324—Preparation from a reaction solution obtained by acidifying with an acid other than orthophosphoric acid

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Fertilizers (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

dicalcium phosphate is prepared from phosphate rock by a process which comprises reacting phosphate rock with sulfur dioxide and an organic carbonyl compound for 0.5 to 10 hours while maintaining the temperature of the reaction mixture below 50° C. The reaction yields a mixture of gangue, solid calcium α-hydroxy sulfonate and soluble dicalcium phosphate. The solids are separated from the liquid and P2 O5 values adhering to the solid are washed free with a mixture of carbonyl, water, and sulfur dioxide. The wash effluent is recycled to the process and both carbonyl and some sulfur dioxide are recovered from the filter cake by heating it. The offgas from the heated filter cake is recycled to the process and the dry filter cake, now largely calcium sulfite hemihydrate, is discarded.
Dicalcium phosphate is precipitated from the reaction mixture filtrate in high yield by partially distilling sulfur dioxide from the filtrate. The precipitated anhydrous dicalcium phosphate is separated from the liquid and dried. Offgas from this drying process as well as both distillate and filtrate is returned to the process. Thus, the only starting materials consumed in the process are phosphate rock and sulfur dioxide. All carbonyl is recovered for recycle.
US05/730,210 1976-10-06 1976-10-06 Preparation of dicalcium phosphate from phosphate rock by the use of sulfur dioxide, water, and carbonyl compounds Pending UST962001I4 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US05/730,210 UST962001I4 (en) 1976-10-06 1976-10-06 Preparation of dicalcium phosphate from phosphate rock by the use of sulfur dioxide, water, and carbonyl compounds
US05/779,038 US4113842A (en) 1976-10-06 1977-03-18 Preparation of dicalcium phosphate from phosphate rock by the use of sulfur dioxide, water, and carbonyl compounds

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/730,210 UST962001I4 (en) 1976-10-06 1976-10-06 Preparation of dicalcium phosphate from phosphate rock by the use of sulfur dioxide, water, and carbonyl compounds

Related Child Applications (1)

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US05/779,038 Continuation US4113842A (en) 1976-10-06 1977-03-18 Preparation of dicalcium phosphate from phosphate rock by the use of sulfur dioxide, water, and carbonyl compounds

Publications (1)

Publication Number Publication Date
UST962001I4 true UST962001I4 (en) 1977-09-06

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Family Applications (2)

Application Number Title Priority Date Filing Date
US05/730,210 Pending UST962001I4 (en) 1976-10-06 1976-10-06 Preparation of dicalcium phosphate from phosphate rock by the use of sulfur dioxide, water, and carbonyl compounds
US05/779,038 Expired - Lifetime US4113842A (en) 1976-10-06 1977-03-18 Preparation of dicalcium phosphate from phosphate rock by the use of sulfur dioxide, water, and carbonyl compounds

Family Applications After (1)

Application Number Title Priority Date Filing Date
US05/779,038 Expired - Lifetime US4113842A (en) 1976-10-06 1977-03-18 Preparation of dicalcium phosphate from phosphate rock by the use of sulfur dioxide, water, and carbonyl compounds

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Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4177052A (en) * 1977-05-06 1979-12-04 Karl Entzmann Process for preparing dicalcium phosphate containing fertilizer
US4238459A (en) * 1978-09-11 1980-12-09 Tennessee Valley Authority Chemical beneficiation of phosphatic limestone and phosphate rock with α-hydroxysulfonic acids
US4252553A (en) * 1979-05-11 1981-02-24 Pircon Ladislav J Process for production of fertilizers
US4395356A (en) * 1980-11-28 1983-07-26 Shell Oil Company Method for removing catalyst residues from solutions of poly-1-butene
NZ204113A (en) * 1982-05-05 1985-08-16 Commw Scient Ind Res Org Recovery of phosphate values from phosphate ore
US4704263A (en) * 1985-06-24 1987-11-03 Advanced Separation Technologies Incorporated Production of potassium phosphates by ion exchange
US4944997A (en) * 1988-11-18 1990-07-31 Xerox Corporation Electrostatographic recording material
CA2164547A1 (en) * 1994-12-26 1996-06-27 Shmuel Stern Process for the manufacture of sulfur-containing fertilizers
BRPI1014338B1 (en) 2009-06-25 2019-12-24 Shell Int Research method for injecting water in a formation containing hydrocarbons, and, method for preparing water with high salinity
WO2012061596A1 (en) 2010-11-05 2012-05-10 Shell Oil Company Treating biomass to produce materials useful for biofuels
BR112014027355B1 (en) 2012-05-07 2020-12-29 Shell Internationale Research Maatschappij B.V. continuous or semi-continuous process to treat biomass
RU2627403C1 (en) * 2016-03-03 2017-08-08 Акционерное общество "Минерально-химическая компания "ЕвроХим" Solid phosphate salt and method of its production

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1137806A (en) * 1914-06-17 1915-05-04 Robert Stewart Process of producing acid monocalcium phosphate.
US1251741A (en) * 1917-06-07 1918-01-01 Carroll Allen Process of treating phosphate materials.
US1981145A (en) * 1933-10-21 1934-11-20 Minerals Separation North Us Process of producing phosphoric acid

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Publication number Publication date
US4113842A (en) 1978-09-12

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